3545781 has 4 divisors (see below), whose sum is σ = 4727712. Its totient is φ = 2363852.

The previous prime is 3545779. The next prime is 3545783. The reversal of 3545781 is 1875453.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (3545779) and next prime (3545783).

It is a cyclic number.

It is not a de Polignac number, because 3545781 - 2¹ = 3545779 is a prime.

It is a super-2 number, since 2×3545781² = 25145125799922, which contains 22 as substring.

It is a D-number.

3545781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3545783) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 590961 + ... + 590966.

It is an arithmetic number, because the mean of its divisors is an integer number (1181928).

Almost surely, 2^3545781 is an apocalyptic number.

It is an amenable number.

3545781 is a deficient number, since it is larger than the sum of its proper divisors (1181931).

3545781 is a wasteful number, since it uses less digits than its factorization.

3545781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181930.

The product of its digits is 16800, while the sum is 33.

The square root of 3545781 is about 1883.0244289440. The cubic root of 3545781 is about 152.4885738998.

The spelling of 3545781 in words is "three million, five hundred forty-five thousand, seven hundred eighty-one".